The PB-203A is a 9.8 x 6.6 x 0.33-inch 2250-tie-point durable powered solderless Breadboard, made of made of transparent ABS with nickel plated phosphor bronze contacts and heavy-gauge aluminum backplate. This premium Proto-Board® brand of solderless breadboarding system continues to be the industry standard for reliability, durability and versatility. This breadboard can be used to fit twenty four 16-pin ICs. This breadboard is capable of being used to design a multitude of analog, digital, logic and microcomputer circuits. The PB-203A on-board power supply eliminates the need for an external supply, adding more versatility to circuit design and experimentation. Due to its ample sized breadboarding area, the PB-203A is ideally suited for virtually any type of breadboarding circuitry, from TTL, CMOS and ECL, to op-amps, audio, comparators, video amps, microprocessor components, phase locks and more.